Character-String Completion

ABSTRACT

This disclosure describes techniques enabling character-string completion. These techniques present characters and character strings responsive to a selected prior character and enable selection of one of these characters or character strings quickly, easily, and/or accurately.

RELATED APPLICATIONS

The present disclosure claims priority to U.S. Provisional PatentApplication Ser. No. 61/595,606 filed Feb. 6, 2012, the disclosure ofwhich is incorporated by reference herein in its entirety.

SUMMARY

A method is described that presents, based on a selected characterselected through a first portion of a single, continuous gesture,multiple character strings representing later parts of words or acronymsof which the selected character is a prior part, enables selection,through a second portion of the single, continuous gesture, to selectone of the multiple character strings, receives selection of one of themultiple character strings through the second portion of the single,continuous gesture, and provides the selected one of the multiplecharacter strings or the word or acronym of which the selected one ofthe multiple character strings represents later parts.

Another method is described that receives an indication indicatingselection of a character, the selection of the character through aportion of a single, continuous gesture received through agesture-sensitive character-entry interface, presents or causespresentation of, responsive to the selection of the character, based onthe character, and prior to completion of the single, continuousgesture, multiple characters in a user interface superimposed adjacent alocation at which the character was selected or over at least a portionof the gesture-sensitive character-entry interface, the multiplecharacters continuing a character string of which the character madethrough the gesture-sensitive character-entry interface is a prior part,enables selection, through a later portion of the single, continuousgesture, to select one of the multiple characters, receives selection ofone of the multiple characters through the later portion of the single,continuous gesture, and provides or presents the selected one of themultiple characters.

Another method is described that presents a first user interface having,and enabling selection of, multiple characters or character stringsthrough a gesture or gesture portion, the multiple characters orcharacter strings presented at least partially obscuring an unselectedcharacter entry control of a second user interface and adjacent to orsurrounding a selected character entry control of the second userinterface, and responsive to selection of one of the multiple charactersor character strings, provides the one of the multiple characters orcharacter strings and ceasing to present at least a portion of the firstuser interface.

These methods are provided by way of example only; they are not intendedto, and are not to be interpreted as limiting the scope of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is described with reference to the accompanyingfigures. In the figures, the left-most digit of a reference numberidentifies the figure in which the reference number first appears. Theuse of the same reference numbers in different instances in thedescription and the figures indicate similar or identical items.

FIG. 1 illustrates an operating environment in which techniques enablingcharacter-string completion can be performed.

FIG. 2 illustrates methods for character-string completion.

FIG. 3 illustrates an example completion interface presenting, andenabling selection of, complete words and their variants.

FIG. 4 illustrates methods for character-string completion, includingthrough multiple stages, each stage based on a selection of a priorstage.

FIG. 5 illustrates a limited-space character-entry interface andmultiple completion interfaces enabling selection of characters instages.

FIG. 6 illustrates methods for user interfaces enabling character-stringcompletion.

FIG. 7 illustrates four completion interfaces partially obscuringportions of an example character-entry interface.

DETAILED DESCRIPTION

Overview

This disclosure describes techniques enabling character-stringcompletion. These techniques present characters and character stringsresponsive to a selected prior character and enable selection of one ofthese characters or character strings quickly, easily, and/oraccurately.

In some embodiments, the described techniques enable selection of a wordand its correct spelling through a single, continuous gesture. Thus, asame gesture that selects the word may also select its proper spelling,even in advance of completing the word. Contrast this with variousconventional techniques, some of which require many gestures to select asingle word, which may or may not be properly spelled, or requireselection of characters to make up a word and then require, with anothergesture, selection of the correct spelling of the characters selected.Even in the best of cases, these conventional techniques often presentfew or even only one properly spelled word estimated to be the wordintended by the selected characters. As will be apparent in thedescription below, the techniques, in some embodiments, are capable ofsolving these and/or other deficiencies present in current techniques.

In the discussion that follows, an operating environment in which thetechniques may be performed is first described. Methods are thendescribed that may be employed in the operating environment as well asother environments. In the discussion below, reference will be made tothe environment by way of example only and, therefore, implementationsdescribed below are not limited to the described environment.

Example Operating Environment

FIG. 1 is an illustration of an example operating environment 100 inwhich the techniques enable character-string completion. Operatingenvironment 100 includes a computing device 102 and a gesture-sensitivedisplay 104. Computing device 102 and gesture-sensitive display 104communicate with each other, though they may be separate, as in the caseof some desktop computers, or integrated, as in the case of somehandheld (e.g., smartphone), laptop, and tablet computers. Computingdevice 102 includes computer processor(s) 106 and computer-readablestorage media 108, which includes a character-entry module 110, acharacter-string completion module 112, and language module 114.

Character-entry module 110 presents character-entry interface 116 andenables gesture-sensitive selection of characters through controls. Anexample of character-entry interface 116 is shown at 116-1 in FIG. 1having controls that appear like keys of a keyboard and arranged in aQWERTY orientation, though other interfaces may instead be used. ThisQWERTY example of character-entry interface 116 presents keys andenables selection of characters through tap gestures or gesture portionson these keys as received through gesture-sensitive display 104.

Character-string completion module 112 (completion module 112) presentscompletion interface 118 and enables selection of characters andcharacter strings using completion interface 118. An example ofcompletion interface 118 is shown at 118-1 in FIG. 1 having selectablecharacter strings presented responsive to selection of the letter “d”through example character-entry interface 116-1. Here example completioninterface 118-1 presents character strings determined to be likely tocomplete a word or acronym starting with the letter “d”. These characterstrings include “o”, for the word “do”, “og” for the word “dog”, “ogs”for the word “dogs”, “oe” for the word “doe”, “oes” for the word “does”,“oesn't” for the “doesn't”, “ad” for the word “dad”, “are” for the word“dare”, “id” for the word “did”, “idn't” for the word “didn't”, and“on't” for the word “don't”. Ways in which character strings arepresented and selection enabled are set forth in greater detail below.

Language module 114 can be one or a combination of various differenttypes of dictionary, word-completion, spelling, or text aggregationentities known in the art. Language module 114 provides characterstrings to completion module 112 based on a language being used (e.g.,American English, European French) and/or a user's history. Languagemodule 114 can provide character strings in various manners known in theart, such as to provide words, text strings and acronyms (e.g., LOL for“laugh out loud”), and/or their likelihood. Language module 114 may doso based on provided character(s), such as the example first letter “d”above and, based on the provided characters, provide character strings(e.g., words), their likelihood, and various other information usable bycompletion module 112. Language module 114 may instead provide characterstrings not based on provided characters, such as providing many wordsof a particular language. In these and some other cases, completionmodule 112 determines which character strings to present based on thecharacter strings provided by language module 114, a selected characteror characters, and/or various other factors described below.

Ways in which the modules and interfaces of example operatingenvironment 100 act and interact are set forth in greater detail below.The entities of FIG. 1 are examples only, other entities, such as anoperating system, may be involved and other arrangements, such as asingle entity performing the actions of character-entry module 110 andcompletion module 112, may instead be used.

Methods for Character-String Completion

This disclosure describes techniques for character-string completion.These techniques enable quick, easy, and/or accurate completion ofcharacter strings. These techniques include various methods illustratedbelow, which may be used separately or in combination, in whole or inpart. Aspects of these methods may be implemented in hardware, firmware,software, or a combination thereof. The methods are shown as a set ofacts that specify operations performed by one or more entities and arenot necessarily limited to the order shown.

FIG. 2 illustrates methods 200 for character-string completion. Methods200 may be performed in various manners. In one manner of performingmethods 200, a user is enabled to select, with as little as a single,continuous gesture, a correctly-spelled word or acronym. In anothermanner, a user is enabled to select a correctly-spelled word or acronymwith multiple gestures located close to each other, thereby makingselection relatively quick and easy. These and other manners ofperforming methods 200 are set forth below.

At 202, an indication indicating selection of a character made through acharacter-entry interface is received. This indication can be receivedinternally, and thus a same entity may provide the indication andreceive it or it may be received from a separate entity. This selectionas indicated can be through a gesture-sensitive interface made through aportion of a single, continuous gesture, such as a tap-and-hold ortouch-and-slide. The selection may instead be through other manners,such as a tap gesture, a swirl, or a two-finger gesture (at once or oneafter the other), to name a few. Whatever the gesture or gestureportion, an indication indicating selection of a character is received.The indication can be received (passively, or actively retrieved) fromvarious entities, such as an operating system, gesture-input managingentity, gesture-sensitive display 104, character-entry module 110, orcharacter-entry interface 116, to name just a few.

By way of example, consider again the example character-entry interface116-1 of FIG. 1. Here assume that a user taps and holds, as a firstportion of a gesture, to select the letter “d”. In response,character-entry module 110 provides an indication to completion module112 that the letter “d” has been selected and that the gesture portionthat selected it is a tap and hold.

At 204, multiple character strings representing later parts of words oracronyms of which the selected character is a part are presented. Thesecharacter strings may be presented responsive to some determination orindication that presentation of characters strings is desired, such asan affirmative selection or an implied or inferred selection, such asbased on a tap-and-hold portion of a gesture being received rather thana tap alone, though other manners may also be used.

Consider a case where a user wishes to enter the word “do”. With a smallword the user may simply wish to use character-entry interface 116 totap the “d” and the “o” without presentation of completion interface118. In other cases, however, a user may wish to use completioninterface 118 to select a character string, such as it being a long wordor one that the user may not know how to spell. Consider a can where auser has forgotten how to spell the word “tongue”. The user may select,with a quick tap, the “t” and then the “o” but a tap and hold on the“n”. In response to the hold (here a preset time delay passing duringwhich a gesture does not substantially move), the techniques may presentmultiple character strings, one of which is the properly spelled word“tongue”, which the user may then select. This is but one of the waysthe techniques enable users to efficiently use character-stringcompletion, including when using two interfaces.

These character strings may also be presented without a determination orindication, in which case selection of a character string instead ofother selections, such as through tapping to select keys of a keyboard,is differentiated based on the type of selection. This will be describedin greater detail elsewhere herein.

The multiple character strings can be presented in various manners aswell. Completion interface 118, for example, may be fully opaque,partially opaque, or nearly transparent. Using FIG. 1 as an example, thecharacter strings “oesn't” may obscure the underlying keys “F”, “G”, and“H” or permit them to be seen, in part, through the character strings.

A fully opaque interface enables the characters strings to be easilyseen and noticed. If the user, however, decides not to select one of thecharacter strings, such as by lifting off his or her finger or stylus,completion module 112 may quickly cease to present the opaque interfacethereby permitting the user to quickly see the underlying keys tocontinue to select characters through character-entry interface 116 (inthe example 116-1, the “F”, “G”, and “H” keys).

A partially opaque interface permits both the character strings and theunderlying character controls (e.g., the keys of 116-1 in FIG. 1) to beseen. This can aid a user in his or her speed to select charactersthrough the character-entry interface 116 should the user decide not toselect a character string.

A nearly transparent interface aids a user in cases where much of thecharacter selection is through character-entry interface 116, and thusthe user's preference is for that interface to be obscured very little.All three of these cases assume that the completion interface 118overlays character-entry interface 116, though this is not required.Having the character strings near a selected character can improve thespeed of selection of the character string, though it may instead occupya different region of gesture-sensitive display 104.

Continuing the ongoing example, completion module 112 receives theindication from character-entry module 110 that the letter “d” isselected through a tap-and-hold portion of a gesture. Here completionmodule 112 determines that character strings are desired based on thetap-and-hold or that the gesture is being maintained. In response,completion module 112 determines character strings to present.

Completion module 112 may determine character strings to present usinglanguage module 114, such as to provide prior characters (here just “d”)to language module 114, and receive back various words and acronyms thatbegin with “d”. Completion module 112 may also receive likelihoods thateach of these various words and acronyms are desired by a typical userin the applicable language or the particular user based in part on auser history of the user's prior character-string selections.

Here assume that language module 114 provides seventy words and acronymsalong with their likelihoods. Completion module 112 determines, based onvarious factors, which characters strings to present. Completion module112 may do so based on lengths of the strings, real estate available ongesture-sensitive display 104 to present the strings, a type ofgesture-sensitive display (e.g., QWERTY keyboard, circular keyboard,fast-entry keyboard, multi-character-per-key limited-space keyboardcommon to some mobile phones), or string density. String density is ameasure of the number of strings that can be presented within an amountof real estate. Thus, completion module 112 may determine to present thestring representing the word “doe” even though it is less likely thanthe word “dreary” because “doe” is also part of two words that are morecommon than “dreary”; namely “does” and “doesn't”. Further, completionmodule 112 may take into account this string density in theaggregate—thus, the multi-string of “do”, “doe”, “does”, and “doesn't”is presented rather than the words “drip” and “drips” because, in theaggregate, the words of the first multi-string are more likely thanthose of the second multi-string.

As shown in the example of FIG. 1, completion module 112 presents,through example completion interface 118-1, character strings capable ofcompleting twelve different words: do, dog, dogs, doe, does (the pluralof “doe”), does (the verb), doesn't, dad, dare, did, didn't, and don't.As noted above, completion interface 118 can be nearly transparent,partially opaque, or fully opaque. In FIG. 1, each of the characters inthe character strings is fully opaque, though spaces between thecharacters are transparent.

At 206, selection is enabled to select one of the multiple characterstrings. In some cases, this selection is enabled through a laterportion of a single, continuous gesture, a prior portion of whichselected the selected character. Note that the selection can be enabledthrough multiple gestures or a single continuous gesture. The gesture orgestures can be a substantially straight line or otherwise, such as agesture starting at “d” and moving through characters “a”, “r”, and “e”to select character string “are” effective to complete the word “dare”or a curved gesture moving through characters “o” and “n′t” to selectcharacter string “on't” to complete the word “don't”. Note also thatcompletion interface 118 may permit selection of a character stringwithout the gesture passing through all of the characters of the string.In some cases, a swipe or other gesture or gesture portion selects thelongest form of the character strings, such as “oesn't” or “idn't”rather than “does” or “did”. This can be enabled through determiningthat the end of the gesture had a velocity or speed rather than a slowstop. This can also be determined based not on an end point of thegesture (e.g., based on the location of lift off), but instead based oninertia or speed of the gesture. If an end point that is determinedbased on a speed or inertia is at or past the last character in thestring, the longest form of the characters strings can be determined tobe selected. Determining an end point of a gesture based on a speed orinertia can be performed in various manners known in the art.

Similarly, the techniques may indicate that one of the character stringsis a default character string. This default character string can beassociated with a particular identifiable gesture portion by which toquickly select the default, such as a spiral, circular shape, zigzag,quick swirl, or swipe away from other presented character strings, toname just a few ways in which to enable selection. This gesture portionmay be an ending portion of a current gesture (such as a current tap andhold) or another gesture.

Continuing the ongoing example, note that the character strings arepresented, and selection of them is enabled, while the tap-and-holdgesture is being maintained. Thus, the user, instead of a tap and lift,taps and holds his or her finger or stylus on the letter “d”. Inresponse, the character strings are presented and selection of them isenabled.

Responsive to presentation, an indication of a selection other than of apresented character string may be received. In such a case thetechniques may cease to present the character strings and return toblock 202, shown with a dashed-line arrow in methods 200. Thus,continuing the ongoing example, in the case of a tap-and-hold of aselected character at block 202, completion module 112 ceases to presentthe character strings if the gesture ends through a lift off at theletter “d”. At this point in the ongoing example, the user chose not toselect one of the character strings. The user may have wanted the word“doughnut”, and on not seeing it presented, ends the gesture by liftingup his or her finger or stylus. If, however, an indication of selectionother than of a presented character string is not received, the methodsproceed to block 208.

At 208, a selection of one of the multiple character strings isreceived. As noted, this selection can be received in various manners.By way of example, assume that the user selects the selected characterstring by continuing the single, continuous gesture noted above with asecond portion. Thus, a tap-and-hold is received on the letter “d”, andwhile the gesture is maintained, the character strings are presented andenabled, and then the user selects, with the same gesture, to swipe fromthe location of the “d” to an end point at the end of one of thecharacter strings. In so doing, with a single gesture a user may selectthe “d” and then the full word or acronym (here correctly spelled), bycontinuing the gesture. Here a tap-and-hold first portion of the gestureand then a swipe movement to the “s” of the “oesn't” string, and then alift off to end the gesture at the “s”, results in the word “does” beingselected quickly, easily, accurately, and with a single, continuousgesture.

At 210, the selected one of the multiple character strings is provided,such as to a data-entry field, control, or some entity capable of usingcharacter strings. Concluding the ongoing example, assume that a user iswriting an email to send through his or her tablet computing devicehaving the QWERTY keyboard of FIG. 1. The user selects, with a single,continuous gesture beginning on the QWERTY keyboard, the word “does” tobe received by the email application, such as to be entered into thesubject line or body of the email. After the selection of the characterstring, methods 200 cease to present character strings and may then waitto receive another indication at block 202. In some cases, methods 200may insert a grammatical character automatically, such as a space afterthe word “does”. Other grammatical characters, such as commas, periods,and those appropriate to the word or language within or after the word(e.g., “café” instead of “cafe” or an umlaut diacritic in the Germanlanguage), may be inserted.

As noted above, various different character-entry and completioninterfaces may be used by the techniques. The following providesadditional examples and embodiments, which may be used alone or inconjunction with each of the various methods described herein.

In one embodiment, completion module 112 presents example completioninterface 118-3 of FIG. 3. Example completion interface 118-3 presentscomplete words or acronyms for selection. Selection is enabled with ashort, simple gesture. A user, for example, may select the word “does,”“did”, or “dog” with a small, simple move from the selected priorcharacter (here “d”), such as with a substantially linear, simplegesture 302 that selects the “d” and moves onto or even just toward butnot onto the “does” control 304. Or a user may select these controlswith a separate gesture that takes little effort, such as a simple tapon any of these controls.

Note that users are often inaccurate in selecting a control, such as thesoft key to select the “d” in FIG. 3. This inaccuracy can be due tosmall controls, large hands, age, or a physical limitation, such as nearblindness or Parkinson's disease. The techniques permit, however, aslittle as one accurate selection. Thus, with but one accurate selectionof the “d” in FIG. 3, other selections may be less accurate orrelatively imprecise. In some other manners, a user may have toaccurately select the “d” and then an “o” and then an “e” and then an“s” to select a character string of “does.” The techniques, in someembodiments however, enable selection of this character string with oneaccurate selection and one fairly imprecise or simple gesture ratherthan four accurate selections. Thus, not only is this four-characterstring selected more easily due to reducing the number of selectionsmade from four to two, but also the accuracy needed for the secondselection.

In another embodiment, completion module 112 enables selection, throughcompletion interface 118-3, to select complete words, word forms of abase word, and/or likely alternatives to those words, such as plurals,verb, adverb, and noun forms of a word, and contractions. The example inFIG. 3 illustrates a contraction of the base word “does” with a secondword “not” shown with “doesn't”, which completion interface 118-3enables a simple gesture or gesture portion to select. Thus, a user isenabled to select the word “does” with a simple move from “d” toward oronto “does” control 304, but with a slight change to that simple moveinstead select the alternative, here “doesn't”. This slight change canbe of many types, such as a different ending, e.g., a turn toward the“n′t” control after first moving onto or toward the “does” control. Inthis example, a simple, curving gesture 306 from the “d” moving towardthe “does” control and then arcing toward the “n′t” control 308 selectsthe word “doesn't”. Completion interface 118-3 may also enable selectionof word forms and alternatives with a simple tap or another gesture aswell, such as a tap on “does” control 304 and then another on “n′t”control 308 or simply one tap on “n′t” control 308 to select “doesn't”.

Note that in this case and various others set forth herein, thetechniques enable a user to select, with as little as one gesture, whichis often a simple and easy gesture to perform, a complete and correctlyspelled word or acronym. Contrast this with a case where a user types aword and then conventional techniques determine that the word isincorrectly spelled or an uncommon word and then either automaticallyreplaces the word as typed or presents an alternative. This conventionaltechnique can be slow, confusing, visually or manually difficult forusers to handle, or inadequate.

The techniques may also or instead enable selection of character stringsin multiple stages. As noted above, a user may select a completecharacter string in a simple, continuous gesture, the character stringfully presented in the user interface. The techniques may also orinstead enable selection in stages, such as with presentation ofmultiple interfaces.

FIG. 4 illustrates methods 400 for character-string completion. Methods400 may be performed in various manners, either alone or in conjunctionwith, in whole or in part, methods 200. In one manner of performingmethods 400, a user is enabled to select a correctly-spelled word oracronym from many possible options through multiple stages, each stagecan be based on a selection of a prior stage.

At 402, an indication indicating selection of a single character or aset of possible characters is received. This indication can be receivedinternally, and thus a same entity may provide the indication andreceive it or it may be received from a separate entity. The indicationcan also be received from a first application associated with agesture-sensitive character-entry interface through which selection ofthe character is made and at a second application.

In cases where a set of possible characters has been selected, methods400 proceed along a “character set” path to block 404. A set ofcharacters is selected, for example, in cases where a control isselected that is associated with more than one character or where aninadequately precise selection is received that possibly indicatesselection of one of two or more characters. At 404, presentation andselection of the characters of the set are enabled. Selection may beenabled similar to selection of character strings as in methods 200above, thereby reducing the selection to a single character.

By way of example, consider FIG. 5, which illustrates character-entryinterface 116-5, which is a limited-space interface having controlsassociated each with a set of characters. Consider key 502, marked “4”,selection of which indicates that one of the following characters isintended: 4, g, h, i. In response to selection of key 502, at 404completion module 112 enables selection of one of these charactersthrough a first stage of example completion interface 118-5-1, the “-1”indicating the first stage. At 406, selection of a single character ofthe set of characters is received. Here assume that a single, continuousgesture 504 selects key 502 and then moves to selected single character“h”.

In cases where a selection of a single character is received at 402,methods 400 may act similarly at 402 as methods 200 at 202, though thisis not required, and proceed along a single-character path to block 408.In either case, methods 400 proceed to block 408 once a character hasbeen selected.

At 408, multiple characters are presented or caused to be presented, themultiple characters representing later parts of words or acronyms ofwhich the selected character is potentially a part. These multiplecharacters can be presented responsive to various gestures or gestureportions, as noted herein. This presentation can be responsive to theselection and prior to completion of a single, continuous gesture. Also,the multiple characters can be presented in various interfaces as notedherein, such as a partially opaque user interface superimposed adjacenta location at which the selected character was input or over at least aportion of the gesture-sensitive character-entry interface. The multiplecharacters continue character strings of which the character madethrough the gesture-sensitive character-entry interface is potentially aprior part.

Continuing the ongoing example, the letter “h” is selected from the setof “4, g, h, i”. Presentation and selection of characters of the set arean example first stage of multiple stages. At 408, completion module 112presents, in a second stage of completion interface 118, marked as118-5-2, four characters for selection. These four can be determinedbased on potential words or acronyms, for example, that begin with “h”and their likelihood as noted above. Thus, the multiple characters ofcompletion interface 118-5-2 include “a” for the words “hair, hairs,hat, hats, had, have, haven't, ham, hams, hack, hacks, habit, habits,habitual” and so on, “e” for the words “he, her, hers', heal, heals,healed, health, healthy” and so on, “u” for the words “hum, humming,hums, hummed, hurt, hurts, hurting, human, humane, HUD (acronym forhousing and urban development)” and so on, and the letter “o” for thewords “home, homes, house, houses, hose, hosed, hoses, hoarse, hour,hours, homely” and so on.

At 410, selection of one of the multiple characters is enabled. Asnoted, selection may be enabled through a later portion of a single,continuous gesture. In the ongoing embodiment, a single continuousgesture selects a first character set, one of multiple presentedcharacters, and further characters in progressive stages, ending withselection of a character string with one gesture. Note, however, thatthe techniques may enable selection with multiple gestures or otherselection manners.

Continuing the ongoing embodiment, selection of letters “a”, “o”, “e”,and “u” are enabled.

At 412, selection of one of the multiple characters of is received. Hereit is received through a later portion of the same gesture 504 thatselected the “4”, then the “h”, and now the “o”.

At 414, the selected one of the multiple characters is provided orpresented. Completion module 112 may provide or present characters invarious manners, such as when each is selected or wait until thecharacter string in full has been selected to provide or present them.In some cases, the techniques provide or present the selected characterstring after receiving an indication that a single, continuous gestureis complete, the gesture having selected a characters string. Theselected character can be provided to various entities, includingcharacter-entry module 110 and/or character-entry interface 116, or someother application or entity, or presented, such as by completioninterface 118.

In the ongoing embodiment, selection of “o” is made after selection of“h”, and the selected characters are shown in a character presentationfield 506. As noted above, characters may be presented or provided invarious ways, such as to other entities, e.g., an email application,which may then present the selected characters and character strings ina subject or body of an email, for example, or a word processingapplication may receive the characters from completion module 112, forexample. Here, in part due to the small amount of screen real estateavailable, characters are presented as selected and in a datapresentation field.

As noted, the techniques may act to repeat portions of the methods, suchas blocks 402, 408, 410, 412, and 414 of methods 400, as shown in theongoing example. After receiving selection of “h” and “o”, completionmodule 112 determines (e.g., by providing “ho” to language module 114and receiving back character strings that begin with “ho”), othermultiple characters to continue potential character strings. Herecompletion module 112 causes completion interface 118 to present andenable selection, shown at 118-5-3, of “w” (for the words “how”,“howdy”, “Howard”, etc.), “r” (for the words “horse”, “horn”,“horrible”, etc.), “u” (for the words “house”, “hour”, etc.), “i” (forthe words “hoison”, “hoist”, and etc.), and “m” (for the words “home”,“homes”, “homely”, “homily”, “homogenize”, and etc.).

Responsive to selection, with another portion of the single, continuousgesture 504 shown at 118-5-3, completion module 112 presents theselected letter “m” in character presentation field 506 (for a total of“hom”), and then presents and enables selection of still additionalmultiple characters, shown at 118-5-4. Methods 400 may continue topresent characters for selection until receiving an indication that thecharacter string is complete (e.g., responsive to a user ending asingle, continuous gesture with a lift off). Methods 400, however, mayat some point present characters to complete the characters string, suchas in cases where the potential character strings available is low orrelatively low based on likelihoods of characters strings being used.This is shown in two different example manners, both of which completethe selected character string at the word “homes.”

In both cases, assume that completion module 112 determines that thelikely character strings desired, when the prior characters selected are“hom” are “home”, “homes”, and “homely”. At this point, completionmodule 112 can present and enable selection of the letters “e” and, forless likely character strings, “o” (for the words “homogenous”,“homogenize”, and “homogeneous”, etc.), though in this examplecompletion module 112 presents the three most-likely words. Thisdetermination can be based on likelihood but also screen real estate,word length, and other factors as noted herein.

In the first example case, completion module 112 causes completioninterface 118 to present and enable, as shown at 118-5-4, selection ofthree different words. Selection, here through the gesture, to the “e”and ending the gesture results in “home”, through the “e” to the “s” andend results in “homes”, and through the “e”, then the “1”, and thenending at the “y” results in “homely”. As shown in characterpresentation field 506, selection of “e” and then “s” at 118-5-4,completion module 112 presents the complete and correctly spelled word“homes”.

In the second example case, a later portion of the single, continuousgesture selects to complete a word string having multiple remainingcharacters. Thus, completion module 112 causes completion interface 118to present and enable, as shown at 118-5-5, selection of three differentwords having multiple characters remaining. Selection here can be fastand simple, as shown by moving to and stopping on a presented completecharacter string “home” and “homely” or a variant “homes”.

Methods 400 perform blocks of the method repeatedly, effective to builda character string in successive stages. Each of the successive stagescan be based on prior selected characters, thereby narrowing thepossible character strings progressively. Thus, methods 400 presentselectable characters selection of which continues a character string,here the selectable characters determined based on one or more existingcharacters of the character string. Also herein, the selectablecharacters are presented graphically proximate a last-selected existingcharacter of the one or more existing characters that is displayed onthe graphical user interface, as shown in FIG. 5.

Also in FIG. 5, even though the amount of real estate for presentingselectable characters is limited, the techniques permit a user toselect, with a single, continuous gesture, many of the possible wordsand acronyms known for the particular language.

Note also that a user may maintain control over a small computingdevice, such as a person holding a smart phone have character-entryinterface 116-5. A person's right thumb, in the example case, may startat control 502 and then, through movement of his or her right thumb,select a character string that can be long. Through this example case, aperson was able to select a characters string without lifting his or herthumb off of the device, and thus lose the stability often provided bythe thumb in conjunction with the palm and fingers holding the device.Further still, the resulting character string is correctly spelledwithin the same selection. Contrast this with some selection manners,such as one that requires three taps to select the “h” through control502, then one or multiple taps to select each of the next fourcharacters (“o”, “m”, “e”, and “s”). In some selection interfaces even afive-letter character string can take ten to fifteen taps, each of whichincludes a possibility of error. The possibility of error can also behigh, especially in cases where a person is holding a small device witha same hand that is selecting characters.

In some embodiments, as noted in part above, selection of more than onecharacter is made either before completion module 112 presentscharacters or selection of a presented character is received. Thus, inmethods 200 or 400 or a combination of parts of them, completion module112 may present selectable characters or character strings and the usermay not select one of the presented characters or strings. In such acase, the user may instead select, through the character-entry interface116, another character while not making a selection through completioninterface 118. Consider a case where a user selects the character “u”.In response, assume completion module 112 presents character strings“umbrella” and its variant “umbrellas” and another word “under”. Assumethat the user wants instead to enter “undulation”. Thus, the userignores, instead selecting tap-by-tap, for example, an “n”. In responseassume that completion module 112 presents “under”, “underwear”, and“underneath”. Again, the user does not select these, instead tapping ona character in character-entry interface 116 for the letter “d” and then“u”. After these four characters are selected, namely “undu”, completioninterface presents two likely characters strings beginning with “undu”,namely: “unduly” and “undulate”, along with variants “undulates” and“undulation”. At this point assume that the user selects “undulation” bycontinuing a gesture selecting the second “u” of “undu” or throughanother gesture or selection manner. Even though, in this example, auser still made four separate selections, the user was able to selectsix additional characters to complete the “undulation” character stringwith a single selection and correctly spelled.

As mentioned in part above, the techniques may use various userinterfaces to enable completion of character strings, either separatelyor in conjunction, in whole or in part, with methods 200 and/or 400.

FIG. 6 illustrates methods 600 enabling user interfaces forcharacter-string completion.

At 602, a user interface is presented having, and selection is enabledof, multiple characters or character strings. The user interface enablesselection of these characters and characters strings through a gestureor gesture portion. The user interface can be presented with themultiple characters or character strings partially obscuring anunderlying other user interface, such as to partially obscure anunselected character entry control of the other user interface. The userinterface may be arranged such that the characters or character stringsare adjacent to or surrounding a prior-selected character, whetherthrough a selected character entry control of the underlying userinterface or a prior iteration of the user interface. Examples of theseuser interfaces are shown in FIGS. 1, 3, and 5.

In FIG. 5, for example, various completion interfaces 118-5 enableselection of characters through stages, each stage having another of thecompletion interfaces. Note that in these non-limiting cases, thetechniques cease to present multiple characters of a prior iteration ofthe interface, other than the selected one of the multiple characters.Further, each successive user interface presents additional charactersor character strings at least partially obscuring character entrycontrols of the underlying user interface and adjacent to or surroundingthe selected one of the multiple characters of the prior iteration.

In some cases, these successive user interfaces are presented havingselectable characters in such a manner as to enable selection withoutthe gesture being jerky or having to substantially change direction witheach portion. This can aid in stability when handling thegesture-sensitive device and/or improve selection accuracy.

Consider, for example, FIG. 7, which illustrates four completioninterfaces 118-7 shown together in an example of gesture sensitivedisplay 104 (shown at 104-7) and partially obscuring portions of examplecharacter-entry interface 116-7 (a QWERTY interface). Each of completioninterfaces 118-7, after the initial interface, are presented insuccession and enable selection at an angle with about a forty-fivedegree or less for a next selection. Smaller or larger angles may beused, such as substantially linear gestures deviating at each portion ofabout twenty degrees, ten degrees, or even fewer degrees. The interfacesare shown together, along with a single, continuous gesture 702 thatselects a complete character string of “strength”, though unselectedcharacters of the interface can cease to be presented for visualclarity. Note that single, continuous gesture 702 does not include hardangles, back-and-forth motions, or complex movements. The techniquesenable this and similar gestures having smooth movements, which mayenable faster, easier, or more-accurate selection of character strings,though other gestures may also or instead be enabled.

Consider initial completion interface 118-7-1 (shown separate fromcharacter entry interface 116-7 for visual clarity), which enablesselection of nine selectable characters in a square disk surrounding theselected character (“s”). Here assume that a gesture selects thecharacter “s” through character-entry interface 116-7 and that initialcompletion interface 118-7-1 enables selection of one of the nineselectable characters with a second portion of that same gesture.

Returning to methods 600, at 604, responsive to selection of one of themultiple characters or character strings, the one of the multiplecharacters or character strings is provided and at least a portion ofthe first user interface ceases to be presented. In cases where acharacter string is selected, completion interface 112 provides thecharacter string as noted elsewhere herein and ceases to present theuser interface (thereby ceasing to obscure the underlying interface). Insome cases, however, a character is selected rather than a completestring. In such a case, methods 600 return to block 602 (shown at dashedline path), where another interface is provided to enable furthercompletion of a character string.

Completion module 112 can enable these interfaces based on an angle froma prior character's location on screen to a subsequently chosencharacter's location on screen, or may instead base it on the gestureportion that made the selection, which may deviate somewhat from thelocations on screen. Thus, a gesture moving from a lower-right corner ofa selectable control to an upper-left corner on a second selectablecontrol residing directly to the right and adjacent the first selectablecontrol may be assumed to be a gesture having zero degrees.Alternatively, the same gesture may be calculated as having an angle ofabout 20 degrees relative to horizontal. In either case, the techniquesmay present the next iteration of the completion interface havingcharacters or character strings being within about forty-five degrees,thereby enabling a smooth gesture portion to select the next character.

Consider again FIG. 7, which shows second, third, and fourth completioninterfaces 118-7-2, 118-7-3, and 118-7-4, respectively. In this exampleembodiment, successive completion interfaces enable selection ofcharacters or character strings with a gesture or gesture portion withinabout forty-five degrees of the prior gesture or gesture portion'sdirection. Here the prior gesture portion that selected the “t” ofinitial completion interface 118-7-1 is approximated with gesturedirection 704. Based on this line, characters presented by secondcompletion interface 118-7-2 are within forty-five degrees of gesturedirection 704. Likewise, the prior gesture portion that selected the “r”of second completion interface 118-7-2 is approximated with gesturedirection 706 and, based on this line, characters presented by thirdcompletion interface 118-7-3 within forty-five degrees of gesturedirection 706. Lastly, the prior gesture portion that selected the “e”of third completion interface 118-7-3 is approximated with gesturedirection 708 and, based on this line, characters presented by fourthcompletion interface 118-7-4 within forty-five degrees of gesturedirection 708.

These completion interfaces 118-7 are presented partially opaque,thereby permitting characters of the underlying interface (116-7) toremain at least partially visible. A user may select, instead ofcontinuing to use one of completion interfaces 118-7, to return to usingcharacter-entry interface 116-7, such as by lifting off his or herstylus or finger. A user may then quickly select a character through theunderlying interface without having to hunt for the character controlsof the underlying interface or wait for a completion interface to ceaseto be presented. Thus, a user may select a control from an interface(e.g., character-entry interface 116-7) obscured by one of completioninterfaces 118-7, the selection determined to be to the underlyinginterface based on the type of gesture or based on completion of theprior gesture.

These completion interfaces 118-7 are presented adjacent to a priorselected character's location, though this is not required. In somecases a user may select a character through character-entry interface116 and indicate a desire to complete the character string using one ormore completion interfaces 118, such as with a hold, circular movement,or other gesture or gesture portion. Instead of presenting an interfaceadjacent the selected character's location, the techniques may insteadpresent a completion interface elsewhere, such as a middle ofgesture-sensitive display 104, which may be affirmatively selectedthrough a gesture or gesture portion at this location. By so doing thetechniques may enable additional real estate in which to presentcharacter strings or successive completion interfaces. The techniquesmay also or instead present a completion interface in a region notoccupied by character-entry interface 116. By so doing the techniquesenable users to visually bifurcate use of completion interface(s) orcontinue to use a character-entry interface. The techniques may do so atany point in the various methods—thus, a user may select multiplecharacters and, at a point where completion interface 112 determinesthat complete characters strings are likely (e.g., that after receiving“stre” in FIG. 7), that complete words or acronyms should be presented.If the amount of real estate adjacent the last-selected character islimited, for example, or the number of complete characters strings takesup too much space near the last-selected characters location, completionmodule 112 may cause completion interface 118 to present the selectablecharacter strings at a different location on gesture-sensitive display104.

Note that one or more of the entities shown in FIG. 1, such ascharacter-entry module 110, character-entry interface 116, completionmodule 112, and completion interface 118 may be further divided,combined, and so on. Each of these entities can be hardware, software,firmware, or a combination thereof, and/or stored on computer-readablestorage media (as shown) and executed by one or more processors. Thiscomputer-readable storage media may include, by way of example and notlimitation, memory devices with persistent and/or nan-transitory datastorage, RAM, ROM, flash, and disk storage devices (e.g., magnetic andoptical hard disk drives or compact disc or digital versatile disk(DVD)). Computing device 102 can be one or a combination of a wiredand/or a wireless device, including those noted above as well as anappliance (e.g., a “smart” refrigerator), a peripheral, a gaming device,a server device, a television (e.g., a set-top box or a digital videorecorder), and similar computing devices. Computing device 102 mayinclude various managing entities and/or an operating system.

Although the subject matter has been described in language specific tostructural features and/or methodological techniques and/or acts, it isto be understood that the subject matter defined in the appended claimsis not necessarily limited to the specific features, techniques, or actsdescribed above, including orders in which they are performed.

What is claimed is:
 1. A method comprising: presenting, based on aselected character selected through a first portion of a single,continuous gesture, multiple character strings representing later partsof words or acronyms of which the selected character is a prior part;enabling selection, through a second portion of the single, continuousgesture, to select one of the multiple character strings; receivingselection of one of the multiple character strings through the secondportion of the single, continuous gesture; and providing the selectedone of the multiple character strings or the word or acronym of whichthe selected one of the multiple character strings represents laterparts.
 2. The method as recited in claim 1, wherein the selectedcharacter is received from an application associated with agesture-sensitive character-entry interface and at a second application,the second application presenting the multiple character strings in asecond user interface and partially obscuring the gesture-sensitivecharacter-entry interface.
 3. The method as recited in claim 1, whereinthe single, continuous gesture is a substantially-straight line.
 4. Themethod as recited in claim 1, wherein the second portion of the single,continuous gesture has a first part and a second part, the first partselecting a first character of the multiple character strings and thesecond part selecting to complete one of multiple character strings. 5.The method as recited in claim 1, wherein enabling selection through thesecond portion of the single, continuous gesture enables selectionthrough a straight line from a starting point at a key of agesture-sensitive character-entry interface, the starting point at a tapmade through the first portion and the straight line being the secondportion.
 6. The method as recited in claim 1, further comprisingindicating that one of the multiple character strings is a defaultcharacter string and enabling selection of the default character stringthrough a particular identifiable gesture portion of the single,continuous gesture.
 7. A system comprising: one or more processors; andmemory having one or more instructions stored thereon that, responsiveto execution by the one or more processors, causes the one or moreprocessors to perform operations comprising: receiving an indicationindicating selection of a character, the selection of the characterthrough a portion of a single, continuous gesture received through agesture-sensitive character-entry interface; presenting or causingpresentation of, responsive to the selection of the character, based onthe character, and prior to completion of the single, continuousgesture, multiple characters in a user interface superimposed over atleast a portion of the gesture-sensitive character-entry interface oradjacent a location at which the character was selected, the multiplecharacters continuing a character string of which the character is aprior part; enabling selection, through a later portion of the single,continuous gesture, to select one of the multiple characters; receivingselection of one of the multiple characters through the later portion ofthe single, continuous gesture; and providing or presenting the selectedone of the multiple characters.
 8. The system of claim 7, the operationsfurther comprising: presenting or causing presentation of, responsive tothe selection of the selected one of the multiple characters, based onthe selected one of the multiple characters, and prior to completion ofthe single, continuous gesture, second multiple characters in a seconduser interface superimposed adjacent another location at which theselected one of the multiple characters was selected, the secondmultiple characters continuing the character string of which theselected one of the multiple characters and the character selectedthrough the gesture-sensitive character-entry interface are prior parts;enabling selection, through a still later portion of the single,continuous gesture, to select one of the second multiple characters; andreceiving selection of one of the second multiple characters through thestill later portion of the single, continuous gesture, and whereinproviding or presenting the selected one of the multiple charactersfurther provides or presents the selected one of the second multiplecharacters.
 9. The system of claim 7, wherein presenting or causingpresentation is responsive to determining that the gesture has not endedor indicates selection of the user interface.
 10. The system of claim 7,wherein providing or presenting is responsive to receiving an indicationthat the single, continuous gesture is complete.
 11. The system of claim7, wherein the indication is received from a first applicationassociated with the gesture-sensitive character-entry interface and at asecond application, the second application presenting the multiplecharacters in the user interface and providing or presenting theselected one of the multiple characters provides the selected one of themultiple characters to the first application.
 12. The system of claim 7,wherein the gesture-sensitive character-entry interface includes acontrol, selection of which selects a set of characters, and theoperations further comprising, prior to receiving the indicationindicating selection of the character: receiving a prior indicationindicating selection of the set of characters; presenting or causingpresentation of, responsive to the selection of the set of charactersand based on the control that is selected, the set of characters in aprior user interface superimposed adjacent a location of the control;enabling selection, through a prior portion of the single, continuousgesture, to select one of the set of characters; and receiving selectionof the selected character of the set of characters and through the priorportion of the single, continuous gesture, and wherein receiving theindication indicating selection of the character indicates the selectedcharacter of the set of characters.
 13. The system of claim 7, furthercomprising, responsive to receiving an indication that the single,continuous gesture is complete, providing a grammatical character andremoving the user interface.
 14. The system of claim 13, wherein thegrammatical character is a space, comma, or period inserted after thecharacter string.
 15. The system of claim 13, wherein the grammaticalcharacter is a language or emphases character altering, or inserted at,a character in the character string.
 16. The system of claim 7, whereinpresenting the user interface is responsive to an affirmative selection.17. The system of claim 16, wherein the affirmative selection is a timedelay passing during the single, continuous gesture or a gesture portionmoving to a location indicating affirmative selection.
 18. The system ofclaim 7, wherein the multiple characters or the user interface arepartially opaque.
 19. The system of claim 7, wherein the multiplecharacters are determined based on words of a language, acronyms or textstrings of the language, words or acronyms or text strings based on auser history, a likelihood of the word or acronym, a size of availablescreen real estate on which the single, continuous gesture can be made,or lengths of the words of the language.
 20. A method comprising:presenting a first user interface having, and enabling selection of,multiple characters or character strings through a gesture or gestureportion, the multiple characters or character strings presented at leastpartially obscuring an unselected character entry control of a seconduser interface and adjacent to or surrounding a selected character entrycontrol of the second user interface; and responsive to selection of oneof the multiple characters or character strings, providing the one ofthe multiple characters or character strings and ceasing to present atleast a portion of the first user interface.
 21. The method as recitedin claim 20, wherein the selection selects one of the multiplecharacters, ceasing to present ceases to present the multiple charactersother than the selected one of the multiple characters, and furthercomprising presenting a third user interface, the third user interfacehaving, and enabling selection of, other multiple characters orcharacter strings through another gesture or gesture portion, the othermultiple characters or characters strings at least partially obscuringanother unselected character entry control of the second user interfaceand adjacent to or surrounding the selected one of the multiplecharacters of the first user interface.
 22. The method as recited inclaim 21, further comprising, responsive to selection of one of theother multiple characters or character strings, providing the selectedone of the other multiple characters or character strings and ceasing topresent the first user interface and the third user interface.
 23. Themethod as recited in claim 21, wherein the selection is through thegesture portion, the gesture portion a later portion later than a priorportion that selected the selected character entry control of the seconduser interface, and wherein enabling selection of the multiplecharacters or characters strings enables selection with the gesturebeing substantially linear.
 24. The method as recited in claim 21,wherein the third user interface enables selection of the one of theother multiple characters or character strings within about forty-fivedegrees of an angle continuing the gesture of which the gesture portionthat selected the selected one of the multiple characters.
 25. Themethod as recited in claim 24, further comprising presenting multipleother interfaces, each of the other interfaces presented responsive to aselection of a character of a prior interface and enabling selectionwithin about forty-five degrees of a direction of an immediately priorgesture portion.
 26. The method as recited in claim 20, wherein themultiple characters or character strings are partially opaque effectiveto enable both the multiple characters or character strings and theunselected character entry control of the second user interface to bevisible.